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Added 2 months ago
Senior Software Test Engineer
Coursera Sourcing
Toronto, ON
As a Senior Software Test Engineer (Test Infrastructure and Tooling) at Coursera, you’ll play a key role in helping teams produce high-quality software for millions of learners across the…
Added 2 months ago
M
Forward Deployed Engineering, US Oncology
McKesson
Mississauga, ON
- Full-time
The US Oncology Network is seeking a Lead Forward Deployed Engineer (FDE) to partner directly with business and operational teams to turn complex, high-value problems into validated…
Added 2 months ago
C
Senior Software Engineer, AI
Calabrio
Canada
- Full-time
Calabrio-Verint is looking for a highly skilled and experienced Senior Software Engineer, AI to perform a key role in our digital transformation program, and deliver exceptional customer…
Added 2 months ago
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Software Development Co-op
commonsku
Remote, Canada
- $3,500 to $4,800 CAD / month
- Full-time
- Remote
Develop and maintain APIs and services using PHP and Python
Added 2 months ago
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Technical Support Engineer
VGS
Canada
- Full-time
Reading and debugging code in at least one of Python, Go, Java, or a similar language. You won't ship production code.
Added 2 months ago
Senior Forward Deployed Engineer (Gemini Enterprise)
Artefact
Montreal, QC
Artefact is looking for a Senior Deployed AI Engineer specialized in Gemini Enterprise and the Google AI stack: an engineer who works embedded with our clients and takes AI products from…
Added 2 months ago
C
Senior Design Verification Engineer
Cognichip
Toronto, ON
- $150,000 to $180,000 CAD / year
- Full-time
We are seeking a Senior Design Verification Engineer who can combine strong verification expertise with applied AI/ML collaboration to help build production-grade tools for chip…
Added 2 months ago
TA
Forward Deployed Engineer (Generative AI)
Tiger Analytics
Canada
- Full-time
Tiger Analytics is looking for experienced Forward Deployed Engineer (Generative AI) with Gen AI experience to join our fast-growing advanced analytics consulting firm. Our employees bring…
Added 2 months ago
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Founding AI Engineer
Eklan
Toronto, ON
- $75,000 to $113,000 USD / year
- Full-time
We are looking for an exceptional Founding AI Engineer to help build the technical foundation required to deliver this vision at global scale.
Added 2 months ago
Z
Software Engineer, New Grad (2027 Start)
Zip
Toronto, ON
- Full-time
As a New Grad Software Engineer you will be responsible for building Zip’s core products and architecture. You will ship features that will be immediately used by our customers, and will…
Added 1 month ago
Transformation Engineer - Software Development, AI & Quality Engineering
Fitch Group
Toronto, ON
Fitch Group is seeking a hands-on Transformation Engineer with strong expertise in software development, AI-enabled engineering, and modern quality practices. This role will focus on…
Added 2 months ago
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Senior Software Developer
AssistIQ
Remote, Canada
- Full-time
- Remote
We are looking for an engineer who embraces modern AI tools as a core part of their development workflow. You should be someone who actively uses AI to accelerate software development,…
Added 2 months ago
SJ
Software Engineer, Applied AI
St. Joseph Communications
Toronto, ON
- $110,000 to $130,000 CAD / year
SJC Media is building the AI layer for its Digital Operations. As the founding Software Engineer, Applied AI, you own that layer end-to-end: from agentic workflows, CRM integrations,…
Added 2 months ago
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Ingénieur(e) principal(e) en essais / Senior Test Engineer
Telesat
Gatineau, QC
- Full-time
The Senior Test Engineer will be responsible for developing and maintaining system verification and validation plans of the Telesat LEO constellation communication system. In addition, they…
Added 2 months ago
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AI Engineer
Cambio
Kitchener, ON
- Full-time
We're looking for an AI Engineer to build AI-powered features, help teammates do their best work, and have fun doing it.
Added 2 months ago
K
AI/ML Engineer - Agentic AI Systems
Kaseya
Toronto, ON
- $160,000 to $240,000 CAD / year
- Full-time
Experience developing and operating production AI or machine learning systems using Python or a comparable programming language
Added 2 months ago
JG
Test Automation Engineer (Playwright, API & AI Automation)
J&M Group
Toronto, ON
- Contract
We are hiring for a Test Automation Engineer (Playwright, API & AI Automation). The role focuses on end-to-end UI and API test automation using Playwright, JavaScript/TypeScript, Python,…
Added 2 months ago
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Senior Software Engineer, Data - Mapping
Lyft
Toronto, ON
- Full-time
As a Senior Software Engineer, Data on the Mapping team, you will collaborate with our world-class team of engineers, product managers, and scientists to grow and improve the quality of…
Added 5 months ago
PS
Senior Data Engineer
Pacific Smoke International Inc
Markham, ON
- $80,000 to $120,000 CAD / year
- Full-time
…build, design, and support it. We’re looking for a Senior Data Engineer to join our scaling…
Added 2 months ago
S
Solutions Architect
Shakudo
Toronto, ON
- Full-time
Backend and frontend experience (e.g., Python, React, TypeScript) - enough to be hands-on when needed
Added 2 months ago
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Test Automation Engineer
TechDoQuest
Toronto, ON
- Full-time
Replicate UI flows on the REST layer using a Python-based framework to validate backend functionality.
Added 2 months ago
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Staff/Sr Staff Electro-Optic Codesign Engineer
Lightmatter
Toronto, ON
- Full-time
We are seeking a Sr. Staff Engineer, Photonic Link Co-Design to join our LSAE team. This is one of the most technically demanding roles at Lightmatter: you will own the end-to-end…
Added 3 months ago
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Technical Architect
Mphasis
Toronto, ON
- Full-time
POSITION / TITLE: MLOps Engineer (Cloud Engineer + DevOps)
Added 2 months ago
PF
Ingénieur·e principal·e en implantation | Senior Implementation Engineer
Power Factors
Brossard, QC
- Full-time
Connaissance des langages de script tels que Python ou Bash
Added 2 months ago
Security Engineer, AWS AppSec
Amazon
Vancouver, BC
AWS Security is looking for an Application Security Engineer to help validate that our services, applications, and websites are designed and implemented to the highest security standards.…

Lightmatter

Staff/Sr Staff Electro-Optic Codesign Engineer

Toronto, ON, Canada

Full-time

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Job details

Job type: Full-time
Apply by: Feb 21, 2027
Posting language: English
Posted: Aug 25, 2026

Original job description

Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads.

Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter!

If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.

Lightmatter is (re)inventing the future of computing with light!

We are seeking a Sr. Staff Engineer, Photonic Link Co-Design to join our LSAE team. This is one of the most technically demanding roles at Lightmatter: you will own the end-to-end simulation, co-design, and laboratory verification of photonic-electronic links in Passage™ - from photonic device modeling through to full transceiver channel characterization in silicon.

You will build and maintain the high-fidelity simulation infrastructure that links optical device performance to system-level BER and link margin, drive co-design between photonic and analog circuit teams, and close the loop between simulation and lab measurement on every tape-out. This role sits at the center of how Lightmatter ensures Passage links meet performance at every process corner - and is the technical anchor for photonic-electronic integration quality.

The right candidate is equally fluent in photonic simulation environments and at a high-speed electro-optic lab bench, and has the seniority to drive architecture decisions with data.

Responsibilities

Develop, own, and continuously improve electro-optic link simulation models covering photonic device, propagation, and channel BER - from electron to photon to electron.
Build multi-physics models that combine optical propagation (VPI Photonics, Lumerical INTERCONNECT / FDTD, sax), analog circuit behavior (Cadence Virtuoso / Spectre, Verilog-A)) into a coherent link analysis framework.
Execute comprehensive corner analysis, Monte Carlo variation sweeps, and process-voltage-temperature (PVT) studies to bound link margin; generate actionable specification tightening recommendations for device and circuit teams.
Work closely with analog circuit designers to co-optimize transmitter driver and receiver front-end for the photonic device interface; drive joint simulation across the optical-electrical boundary.
Contribute to photonic link budgets end-to-end: optical power, modulation efficiency, receiver sensitivity, noise floor, and SNR/OSNR margins.
Contribute to simulation-to-silicon closure methodology for Passage optical links; author test protocols, define measurement sequences, and iterate link models against measured data across process splits and device corners.
Identify and diagnose root causes of link performance gaps - distinguishing photonic, electrical, and integration origins - and drive corrective design actions.
Author and review photonic link architectural specifications, co-design interface requirements, and design-entry criteria for photonic and circuit teams.
Contribute to Passage product-level link planning: propose photonic and electronic co-design opportunities to improve link margin, power efficiency, or yield.

Requirements

PhD in Electrical Engineering, Applied Physics, Physics, or a closely related photonics/optics discipline and 5+ years of experience; or MS + 8 years of directly relevant industry experience at a photonic IC, transceiver, or optical interconnect company.
Deep expertise in photonic device physics and system-level optical link design: silicon photonic modulators, Ge photodetectors, passive WDM components, optical amplifiers, and coherent or intensity-modulated link topologies.
Hands-on proficiency with photonic simulation: VPI Photonics, Lumerical FDTD / INTERCONNECT, or equivalent optical propagation and circuit co-simulation tools.
Experience with analog and mixed-signal simulation: Cadence Virtuoso / Spectre, Verilog-A behavioral modeling, or Keysight ADS for electrical-optical co-simulation.
Demonstrated experience developing and executing optical link budgets, corner analyses, and simulation-to-measurement closure workflows.
Demonstrated high-speed lab skills: vector network analyzers (VNA) / S-parameter characterization, optical spectrum analyzers, high-bandwidth real-time oscilloscopes, BER test sets, optical modulation analyzers (OMA), and optical power meters.
Proficiency in Python for simulation scripting, measurement automation, and statistical post-processing.
Excellent written and verbal communication; able to drive architecture and specification discussions with device and circuit teams.
Familiarity with SERDES architecture: equalization topologies (FFE, DFE, CTLE), CDR, and mixed-signal PHY co-design for high-speed interfaces.

Preferred Qualifications

Silicon photonics tape-out and post-silicon characterization experience; familiarity with PDK-level device models and extracted simulation vs. measurement correlation.
Exposure to co-packaged optics (CPO), near-package optics (NPO), or optical I/O chiplet integration challenges.
Signal processing knowledge: DSP for optical communications, forward error correction (FEC), or PAM-4 / NRZ / coherent modulation format trade-offs and simulation.
Experience with Monte Carlo and statistical design methodologies in the context of photonic-electronic system co-design.

We offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.

Salary Range: total compensation goes beyond base salary, it also includes a new hire equity grant, annual performance-based equity, and other rewards that recognize your impact and contribution.: $180,000 USD - $240,000 USD

Benefits

Comprehensive Health Care Plan (Medical, Dental & Vision)
Retirement Savings Matching Program
Life Insurance (Basic, Voluntary & AD&D)
Generous Time Off (Vacation, Sick & Public Holidays)
Paid Family Leave
Short Term & Long Term Disability
Training & Development
Commuter Benefits
Flexible, hybrid workplace model
Equity grants (applicable to full-time employees)

Benefits eligibility may vary depending on your employment status and location. Lightmatter recruits, employs, trains, compensates, and promotes regardless of race, religion, color, national origin, sex, disability, age, veteran status, and other protected status as required by applicable law.

Export Control

Candidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.

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More about this job

Responsibilities

Own the end-to-end simulation, co-design, and laboratory verification of photonic-electronic links for the Passage engine. Develop high-fidelity multi-physics models to link optical device performance to system-level BER and link margin.

Requirements

Requires a PhD in EE, Physics, or related field with 5+ years of experience, or an MS with 8+ years of industry experience in photonic ICs or transceivers. Must be proficient in photonic simulation tools, high-speed lab equipment, and Python scripting.

Skills

Photonic Device Modeling
Electro-Optic Link Simulation
VPI Photonics
Lumerical FDTD/INTERCONNECT
Cadence Virtuoso/Spectre
Verilog-A
Python
Vector Network Analyzers
Optical Spectrum Analyzers
BER Test Sets
Link Budgeting
SERDES Architecture
Silicon Photonics
Analog Circuit Design
Corner Analysis
Monte Carlo Simulation

Benefits

Comprehensive Health Care Plan (Medical, Dental & Vision)
Life Insurance (Basic, Voluntary & AD&D)
Generous Time Off (Vacation, Sick & Public Holidays)
Paid Family Leave
Short Term & Long Term Disability
Training & Development
Commuter Benefits
Flexible, hybrid workplace model
Equity grants

Visa sponsorship

Not detected in the job text

Keywords

Silicon Photonics
Electro-Optics
Passage
WDM
Photodetectors
Modulators
Optical Amplifiers
Coherent Modulation
Intensity-Modulated
SNR
OSNR
PVT Studies
S-parameter
OMA
FFE
DFE
CTLE
CDR
Mixed-Signal PHY
CPO
NPO
Optical I/O
DSP
FEC
PAM-4
NRZ
PDK
Post-silicon Characterization
HPC
AI Infrastructure

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